Bs en 00003 8 2006 (2007)

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BRITISH STANDARD Portable fire extinguishers — Part 8: Additional requirements to EN 3-7 for the construction, resistance to pressure and mechanical tests for extinguishers with a maximum allowable pressure equal to or lower than 30 bar The European Standard EN 3-8:2006 has the status of a British Standard ICS 13.220.10 12&23 30 g (+ - 10) % E.1.2 Pressure test Gas (compressed and liquefied) cartridge bodies shall be designed for a test pressure greater than or equal to 1,3 times the service pressure at the temperature of Tmax Carbon dioxide propellant gas cartridges shall have a minimum test pressure of 250 bar The minimum burst pressure shall be 1,5 times the test pressure Each cartridge body shall be subjected to the pressure test This pressure shall be applied for an adequate duration to ensure that it is leak tight No deformation visible to the naked eye shall occur One gas cartridge in every 000 or one in each batch, whichever is the smaller number, shall be tested for minimum burst pressure and shall comply with the requirements according to 6.3.2 If any item fails to meet the minimum requirements, further samples shall be taken in accordance with the Table and the test against which failure was recorded shall be repeated If one or more of the samples fails to meet the minimum requirements, the whole batch shall be rejected The cartridge body shall remain leak tight up to the burst pressure Any burst shall only occur in the cylindrical part of the cartridge body as a ductile burst If the cartridge body does not meet the requirements, more cartridge bodies from the same batch shall be subjected to the same burst pressure If one of the cartridge bodies is defective, the remainder of the batch shall be rejected 24 EN 3-8:2006 (E) E.2 Non-refillable cartridges E.2.1 Construction Non-refillable cartridges > 0,05 l shall meet the requirement of E.1 Non-refillable cartridges ≤ 0,05 l shall be made of steel, aluminium or aluminium alloy Carbon dioxide cartridges shall have a filling density ≤ 0,750 kg/l E.2.2 Pressure test This clause applies to cartridges with an internal volume ≤ 0,05 l Carbon dioxide propellant gas cartridges shall have a test pressure of 250 bar Those containing other gases shall have a test pressure of at least 1,3 times the service pressure at the temperature of Tmax The minimum burst pressure shall be 450 bar One cartridge per 000 shall be subjected to the burst pressure test If the manufacturer’s batch is < 000 pieces, one cartridge per batch shall be subjected to the test Any burst shall only occur in the cylindrical part of the cartridge as a ductile burst E.3 Marking All cartridges shall have at least the following markings:  actual empty mass, in g or kg (to three decimal places);  theoretical full mass, in g or kg (to three decimal places);  nature of content, e.g CO2, N2;  mass of CO2 or content, in g or kg (to three decimal places), and/or charging pressure of the compressed gas, in bar;  year of manufacture;  mark or name of the manufacturer The marking shall not become damaged during normal handling in manufacture and use and shall remain clearly legible 25 EN 3-8:2006 (E) Annex F (informative) Propellant gas cartridges volume equal to or greater than 0,12 l but less than 0,5 l F.1 Construction The cartridge body shall be made of a steel or aluminium or aluminium alloy intended for the construction of pressure vessels The mechanical properties of the steel, aluminium or aluminium alloy used shall ensure that the minimum burst pressure requirement is met For all refillable cartridges the connection between the adapter and the body shall be designed to withstand at least the minimum bursting pressure of the cartridge body The carbon dioxide cartridge body shall have a filling density ≤ 0,750 kg/l The filling tolerance shall be for cartridges ≤ 30 g (+ - 15) % and > 30g (+ - 10) % F.2 Pressure test Gas (compressed and liquefied) cartridge bodies shall be designed for a test pressure greater than or equal to 1,3 times the service pressure at the temperature of Tmax Carbon dioxide propellant gas cartridges shall have a minimum test pressure of 250 bar The minimum burst pressure shall be 1,5 times the test pressure Each cartridge body shall be subjected to the pressure test This pressure shall be applied for an adequate duration to ensure that it is leak tight No deformation visible to the naked eye shall occur One gas cartridge in every 000 or one in each batch, whichever is the smaller number, shall be tested for minimum burst pressure and shall comply with the requirements according to 6.3.2 If any item fails to meet the minimum requirements, further samples shall be taken in accordance with the Table and the test against which failure was recorded shall be repeated If one or more of the samples fails to meet the minimum requirements, the whole batch shall be rejected The cartridge body shall remain leak tight up to the burst pressure Any burst shall only occur in the cylindrical part of the cartridge body as a ductile burst If the cartridge body does not meet the requirements, more cartridge bodies from the same batch shall be subjected to the same burst pressure If one of the cartridge bodies is defective, the remainder of the batch shall be rejected F.3 Marking All cartridges shall have at least the following markings: 26 EN 3-8:2006 (E)  actual empty mass, in g or kg (to three decimal places);  theoretical full mass, in g or kg (to three decimal places);  nature of content, e.g., CO2, N2;  mass of CO2 or content, in g or kg (to three decimal places) and or charging pressure of the compressed gas, in bar;  year of manufacture;  mark or name of the manufacturer The marking shall not become damaged during normal handling in manufacture and use and shall remain clearly legible 27 EN 3-8:2006 (E) Annex G (normative) Overfill pressure test NOTE See 6.4 A cartridge operated water based media extinguisher with all its associated fittings shall be filled to 95 % of brimful capacity and fitted with the correct cartridge The extinguisher shall be conditioned at Tmax for 24 h The extinguisher shall then be operated in the correct manner and the results recorded Where there is a jet control device fitted at the end of the hose it shall remain closed during the test 28 EN 3-8:2006 (E) Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC This European Standard has been prepared under a mandate given to CEN by the European Commission to provide a means of conforming to Essential Requirements of the New Approach Directive Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one Member State, compliance with the clauses of this standard given in Table ZA.1 confers, within the limits of the scope of this standard, a presumption of conformity with the corresponding Essential Requirements of that Directive and associated EFTA regulations Table ZA.1 — Correspondence between this European Standard and Directive 97/23/EC Clause(s) in EN 3-8 Essential Requirements Directive 97/23/EC of Qualifying Remarks/Notes 6, Annex G 2.2.4 Experimental design method 6.3.4.4 2.8 Assembly 7.2 3.1.2 Permanent joining 7.3 3.1.5 Traceability 8.1 3.2.1 Final inspection 8.1.1, 8.1.2, 8.1.2.3, 8.2 3.2.2 Proof test 3.3 a,b,c Marking and labelling 6.3.4, 8.1.2 7.4 Hydrostatic test pressure WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling within the scope of this standard 29 BS EN 3-8:2006 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards 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